| Atmospheric deposition is one of transport approaches of heavy metals. Farmland is facing heavy metal pollution from the surrounding industries. In this study, we selected a typical farmland area to explore the spatial-temporal variation characteristics of heavy metal deposition around a copper smelter. Between May, 2012 to April, 2013, atmospheric deposition samples（dry and wet） were collected monthly at 8 monitoring sites. The annual deposition fluxes of heavy metals were 638.0 mg·m-2·a-1, 6.56 mg·m-2·a-1, 70.0 mg·m-2·a-1, 225.0 mg·m-2·a-1, and 22.7 mg·m-2·a-1 for Cu, Cd, Pb, Zn and Cr, respectively. These heavy metals showed temporal variations. Zinc and Cr depositions had significant monthly and seasonal variations（P<0.05）, but Cd showed significant monthly variation only（P<0.05, n=96）, and Pb seasonal differences only（P<0.05, n=32）. However, no significant monthly or seasonal variations were found for Cu deposition. The annual deposition fluxes of Cu, Cd and Pb had markedly difference between monitoring sites（P<0.01, n=8）, but not for Zn and Cr（P>0.05, n=8）. |
